1
|
Reece ME, Li J, Strzelecki AC, Wen J, Zhang Q, Guo X. Surface thermodynamics of yttrium titanate pyrochlore nanomaterials. NANOSCALE 2024; 16:5421-5432. [PMID: 38385242 DOI: 10.1039/d3nr05605h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Nanocrystalline pyrochlore materials have been investigated for their enhanced radiation tolerance as ceramic nuclear waste hosts. In this work, we study the thermodynamic driving force of nano-scale materials for radiation resistance. The size dependent thermodynamic properties of a series of Y2Ti2O7 nanoparticles were investigated. Samples were synthesized by a sol-gel method and characterized by synchrotron X-ray diffraction, BET analysis, and thermogravimetric analysis. The surface and interface enthalpies of Y2Ti2O7 were determined by high temperature oxide melt drop solution calorimetry to be 4.07 J m-2 and 3.04 J m-2, respectively. The experimentally obtained surface energy is in good agreement with computationally derived average surface energies for yttrium and other rare-earth titanate pyrochlores. Theoretical links between nanoparticle stability, surface energy, and radiation resistance of pyrochlore materials were then explored.
Collapse
Affiliation(s)
- Margaret E Reece
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Jiahong Li
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Andrew C Strzelecki
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
- The School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA
| | - Juan Wen
- School of Materials and Energy, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Qiang Zhang
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
| | - Xiaofeng Guo
- Department of Chemistry, Washington State University, Pullman, WA 99164, USA.
- The School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164, USA
| |
Collapse
|
2
|
Zeng B, Zeng X, Hu L, Huang L, Huang Y, Zhou Y, Liu G, Huang W. Activated carbon from Camellia oleifera shells for adsorption of Y(iii): experimental and DFT studies. RSC Adv 2024; 14:4252-4263. [PMID: 38292269 PMCID: PMC10826800 DOI: 10.1039/d3ra08487f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 01/18/2024] [Indexed: 02/01/2024] Open
Abstract
Yttrium is an important rare earth element and is widely used in fields such as special glass preparation, metallurgy, and materials science. However, it is difficult to recover yttrium ion waste from dilute solutions with traditional processes, resulting in a significant waste of rare earth resources. The simple, effective, and easy-to-operate adsorption method is the most promising method for recovering yttrium, which is of great significance for sustainable development of the rare earth industry. In this study, activated carbon was prepared from Camellia oleifera fruit shells (COS) using phosphoric acid activation, and efficient recovery of Y(iii) from the Camellia oleifera fruit shell activated carbon was studied. Adsorption equilibrium data showed that this activated carbon had a Y(iii) adsorption capacity of 35.41 mg g-1, indicating significant potential for recovery of yttrium ions. The adsorption of Y(iii) by the activated carbon prepared from COS was consistent with the Langmuir model, and the adsorption data were consistent with the pseudo second-order kinetic model, indicating that the adsorption process was primarily chemical adsorption. After adsorption, the surface of the activated carbon contained large amounts of N, O, and Y, indicating that Y(iii) was stably adsorbed. The mechanisms for adsorption of Y(iii) on three types of activated carbon were studied through DFT calculations. The results showed that Y(iii) interacted with the carbon atoms on the surfaces to form new chemical bonds. The yttrium ion adsorption capacities for the three different activated carbons decreased in the order C I > C II > C.
Collapse
Affiliation(s)
- Bin Zeng
- Gannan University of Science and Technology Ganzhou 341000 China
- Jiangxi University of Science and Technology Ganzhou 341000 China
- Jiangxi Yaosheng Tungsten Industry Co., Ltd Ganzhou 341000 China
| | - Xiangrong Zeng
- Gannan University of Science and Technology Ganzhou 341000 China
- Jiangxi Yaosheng Tungsten Industry Co., Ltd Ganzhou 341000 China
| | - Lianghui Hu
- Jiangxi Yaosheng Tungsten Industry Co., Ltd Ganzhou 341000 China
| | - Lijinhong Huang
- Jiangxi University of Science and Technology Ganzhou 341000 China
- WA School of Mines: Minerals, Energy and Chemical Engineering, Curtin University Perth WA 6845 Australia
| | - Yuxiang Huang
- Gannan University of Science and Technology Ganzhou 341000 China
| | - Yi Zhou
- Gannan University of Science and Technology Ganzhou 341000 China
| | - Guoliang Liu
- Gannan University of Science and Technology Ganzhou 341000 China
| | - Wanfu Huang
- Jiangxi University of Science and Technology Ganzhou 341000 China
| |
Collapse
|
3
|
Li D, Jiang C, Jiang C, Liu F, Zhu Q. Geochemical characteristics and migration patterns of rare earth elements in coal mining subsidence lakes under the influence of multiple factors. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166668. [PMID: 37660822 DOI: 10.1016/j.scitotenv.2023.166668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 08/26/2023] [Accepted: 08/27/2023] [Indexed: 09/05/2023]
Abstract
Mining activities cause surface subsidence and the formation of subsidence lakes, which dynamically change with the continuous coal mining activities. Under the combined influence of various human activities such as agriculture, aquaculture, and floating photovoltaic (FPV), the lake environment undergoes continuous changes, thereby altering the geochemical characteristics of rare earth elements (REEs) in the sediment. This study focused on the subsidence lakes in the Huainan coalfield in eastern China to examine the REEs content in the sediment, elucidated the temporal variations and geochemical characteristics of REEs distribution, explored the main controlling factors of REEs in the sediment, and revealed the migration and transformation behavior of REEs during dynamic subsidence processes. The study revealed that the migration pattern of REEs in the sediment was closely related to the duration of subsidence. The average content of REEs in lake sediments with subsidence duration <5 years increased from 219 μg·g-1 to 248 μg·g-1 compared to the soil, showing an enrichment model primarily driven by rainwater runoff, groundwater input retention, and mineral dissolution. With further subsidence, the processes of reduction dissolution of Fe-Mn oxides/hydroxides, organic colloid adsorption, and hydraulic disturbance gradually replaced the aforementioned enrichment behavior as the main migration pathways, resulting in a decrease in the average REEs content in the sediment to 179 μg·g-1 for subsidence durations exceeding 10 years. There was no strong correlation between REEs fractionation and subsidence duration. Artificial activities, such as FPV, are important factors causing Cerium and Erbium anomalies in some subsidence lake sediments. This study was not only of significant importance for understanding the migration, distribution, and environmental behavior of pollutants in aquatic environments under the interference of human activities but also provided a solid theoretical foundation for the future management of coal mining subsidence lakes.
Collapse
Affiliation(s)
- Desheng Li
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China
| | - Chunlu Jiang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China; School of Resources and Geoscience, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China.
| | - Chenghong Jiang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China
| | - Feng Liu
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China
| | - Qiyu Zhu
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, Anhui, China
| |
Collapse
|
4
|
Duan X, Ning Z, Wang W, Li Y, Zhao X, Liu L, Li W, Chang L. Y-mediated optimization of 3DG-PbO 2 anode for electrochemical degradation of PFOS. BMC Chem 2023; 17:146. [PMID: 37891592 PMCID: PMC10612263 DOI: 10.1186/s13065-023-01057-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023] Open
Abstract
In our previous study, the three-dimensional graphene-modified PbO2 (3DG-PbO2) anode was prepared for the effective degradation of perfluorooctanesulfonat (PFOS) by the electrochemical oxidation process. However, the mineralization efficiency of PFOS at the 3DG-PbO2 anode still needs to be further improved due to the recalcitrance of PFOS. Thus, in this study, the yttrium (Y) was doped into the 3DG-PbO2 film to further improve the electrochemical activity of the PbO2 anode. To optimize the doping amount of Y, three Y and 3DG codoped PbO2 anodes were fabricated with different Y3+ concentrations of 5, 15, and 30 mM in the electroplating solution, which were named Y/3DG-PbO2-5, Y/3DG-PbO2-15 and Y/3DG-PbO2-30, respectively. The results of morphological, structural, and electrochemical characterization revealed that doping Y into the 3DG-PbO2 anode further refined the β-PbO2 crystals, increased the oxygen evolution overpotential and active sites, and reduced the electron transfer resistance, resulting in a superior electrocatalytic activity. Among all the prepared anodes, the Y/3DG-PbO2-15 anode exhibited the best activity for electrochemical oxidation of PFOS. After 120 min of electrolysis, the TOC removal efficiency was 80.89% with Y/3DG-PbO2-15 anode, greatly higher than 69.13% with 3DG-PbO2 anode. In addition, the effect of operating parameters on PFOS removal was analyzed by response surface, and the obtained optimum values of current density, initial PFOS concentration, pH, and Na2SO4 concentration were 50 mA/cm2, 12.21 mg/L, 5.39, and 0.01 M, respectively. Under the optimal conditions, the PFOS removal efficiency reached up to 97.16% after 40 min of electrolysis. The results of the present study confirmed that the Y/3DG-PbO2 was a promising anode for electrocatalytic oxidation of persistent organic pollutants.
Collapse
Affiliation(s)
- Xiaoyue Duan
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, 136000, China
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Ziqi Ning
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, 136000, China
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Weiyi Wang
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China
| | - Yitong Li
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, 136000, China
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Xuesong Zhao
- Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, Siping, 136000, China
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Liyue Liu
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Wenqian Li
- College of Engineering, Jilin Normal University, Siping, Jilin, China
| | - Limin Chang
- Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, Changchun, 130103, China.
| |
Collapse
|
5
|
Wang J, Wang G, Wang S, Hao T, Hao J. Coupling of Nd doping and oxygen-rich vacancy in CoMoO 4@NiMoO 4 nanoflowers toward advanced supercapacitors and photocatalytic degradation. Phys Chem Chem Phys 2023; 25:26748-26766. [PMID: 37781847 DOI: 10.1039/d3cp04070d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/03/2023]
Abstract
In this paper, we successfully prepared rare earth element-doped 0.8% Nd-CoMoO4@NiMoO4 nanoflowers with a large specific surface area using the sol-gel method for the first time. In the experiment, we added a structure-directing agent to successfully assemble the nanosheets into a three-dimensional ordered micro-flower shape. By using the strategy of forming a flower-shaped morphology with a structure-directing agent and doping Nd elements to generate oxygen vacancies, the problems of the collapse of the active material structure and slow reaction kinetics were solved. Through relevant electrochemical performance tests, it was found that when the rare earth element Nd was doped at a concentration of 0.8%, the material exhibited exceptional specific capacitance (2387 F g-1 at 1 A g-1) and cycling stability (99.3% after 10 000 cycles at 5 A g-1). These performance characteristics far surpassed those of the other synthesized products. We assembled 0.8% Nd-CoMoO4@NiMoO4 with hydrophilic CNTs into an asymmetric device, 0.8% Nd-CoMoO4@NiMoO4//CNTs. This device exhibited high specific capacitance (262 F g-1 at 1 A g-1) and cycling stability (99.2% after 3000 cycles), with a good energy storage effect. In addition, 0.8% Nd-CoMoO4@NiMoO4 has a low band gap, which broadens the absorption range of the product and improves the utilization rate of visible light. The photocatalyst showed good degradation efficiency (all exceeding 96%) and cycling stability (96%) for all four dyes. This paper provides a new strategy and method for preparing doped polymetallic mixtures, which has potential application value.
Collapse
Affiliation(s)
- Jing Wang
- School of Light Industry, Harbin University of Commerce, Harbin 150028, China.
| | - Gang Wang
- School of Light Industry, Harbin University of Commerce, Harbin 150028, China.
| | - Shen Wang
- School of Chemistry and Chemical Engineering, Quzhou College, Quzhou 324000, China
| | - Tingting Hao
- School of Astronautics, Harbin Institute of Technology, Harbin 150001, China
| | - Jian Hao
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Ningxia 750021, China
| |
Collapse
|
6
|
Kanwar K, Pradhan S, Satapathy S, Bitla Y, Panwar N. Structural, optical and dielectric investigations on RECr0.85Mn0.15O3 (RE = Ho, Gd and Pr) nanoparticles. J RARE EARTH 2023. [DOI: 10.1016/j.jre.2023.02.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
7
|
Simonenko TL, Simonenko NP, Gorobtsov PY, Simonenko EP, Kuznetsov NT. Microextrusion Printing of Multilayer Hierarchically Organized Planar Nanostructures Based on NiO, (CeO 2) 0.8(Sm 2O 3) 0.2 and La 0.6Sr 0.4Co 0.2Fe 0.8O 3-δ. MICROMACHINES 2022; 14:3. [PMID: 36677064 PMCID: PMC9865654 DOI: 10.3390/mi14010003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/11/2022] [Accepted: 12/18/2022] [Indexed: 06/17/2023]
Abstract
In this paper, NiO, La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) and (CeO2)0.8(Sm2O3)0.2 (SDC) nanopowders with different microstructures were obtained using hydrothermal and glycol-citrate methods. The microstructural features of the powders were examined using scanning electron microscopy (SEM). The obtained oxide powders were used to form functional inks for the sequential microextrusion printing of NiO-SDC, SDC and LSCF-SDC coatings with resulting three-layer structures of (NiO-SDC)/SDC/(LSCF-SDC) composition. The crystal structures of these layers were studied using an X-ray diffraction analysis, and the microstructures were studied using atomic force microscopy. Scanning capacitance microscopy was employed to build maps of capacitance gradient distribution over the surface of the oxide layers, and Kelvin probe force microscopy was utilized to map surface potential distribution and to estimate the work function values of the studied oxide layers. Using SEM and an energy-dispersive X-ray microanalysis, the cross-sectional area of the formed three-layer structure was analyzed-the interfacial boundary and the chemical element distribution over the surface of the cross-section were investigated. Using impedance spectroscopy, the temperature dependence of the electrical conductivity was also determined for the printed three-layer nanostructure.
Collapse
Affiliation(s)
- Tatiana L. Simonenko
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., Moscow 119991, Russia
| | - Nikolay P. Simonenko
- Kurnakov Institute of General and Inorganic Chemistry of the Russian Academy of Sciences, 31 Leninsky pr., Moscow 119991, Russia
| | | | | | | |
Collapse
|
8
|
Electrocatalytic performance of CNTs/graphene composited rare earth phthalocyanines (M=La, Y, Yb, Sc). J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.12.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
9
|
Maiti TK, Majhi J, Maiti SK, Singh J, Dixit P, Rohilla T, Ghosh S, Bhushan S, Chattopadhyay S. Zirconia- and ceria-based electrolytes for fuel cell applications: critical advancements toward sustainable and clean energy production. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:64489-64512. [PMID: 35864400 DOI: 10.1007/s11356-022-22087-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Accepted: 07/14/2022] [Indexed: 06/15/2023]
Abstract
Solid oxide fuel cells (SOFCs) are emerging as energy conversion devices for large-scale electrical power generation because of their high energy conversion efficiency, excellent ability to minimize air pollution, and high fuel flexibility. In this context, this critical review has focussed on the recent advancements in developing a suitable electrolyte for SOFCs which has been required for the commercialization of SOFC technology after emphasizing the literature from the prior studies. In particular, the significant developments in the field of solid oxide electrolytes for SOFCs, particularly zirconia- and ceria-based electrolytes, have been highlighted as important advancements toward the production of sustainable and clean energy. It has been reported that among various electrolyte materials, zirconia-based electrolytes have the potential to be utilized as the electrolyte in SOFC because of their high thermal stability, non-reducing nature, and high mechanical strength, along with acceptable oxygen ion conductivity. However, some studies have proved that the zirconia-based electrolytes are not suitable for low and intermediate-temperature working conditions because of their poor ionic conductivity to below 850 °C. On the other hand, ceria-based electrolytes are being investigated at a rapid pace as electrolytes for intermediate and low-temperature SOFCs due to their higher oxygen ion conductivity with good electrode compatibility, especially at lower temperatures than stabilized zirconia. In addition, the most emerging advancements in electrolyte materials have demonstrated that the intermediate temperature SOFCs as next-generation energy conversion technology have great potential for innumerable prospective applications.
Collapse
Affiliation(s)
- Tushar Kanti Maiti
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Jagannath Majhi
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Subrata Kumar Maiti
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Jitendra Singh
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Prakhar Dixit
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Tushita Rohilla
- Department of Mechanical Engineering, IIT Ropar, Punjab, 140 001, India
| | - Samaresh Ghosh
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Sakchi Bhushan
- Department of Paper Technology, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India
| | - Sujay Chattopadhyay
- Department of Polymer and Process Engineering, IIT Roorkee Saharanpur Campus, Saharanpur, 247001, India.
| |
Collapse
|
10
|
Zheng Q, Hu T, Le Roux S, Li M, Chen C, Yu J, Wang J, Ren W, Ren Z. Local atomic structure evolution of liquid gadolinium and yttrium during solidification: An ab initio study. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.07.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
|
11
|
Pd-La0.6Sr0.4Co0.2Fe0.8O3– composite as active and stable oxygen electrode for reversible solid oxide cells. J RARE EARTH 2022. [DOI: 10.1016/j.jre.2022.02.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|